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I guess I wonder why the original post said "no chop saw" because you don't have one or you have already tried and it was slow or eat up too many blades? (abrasive}
I use the my chop saw or hand held gas or electric saw with diamond blades and it rolls great! But I bought 40 blades at an auction for nothing and I burn them up like there is no tomorrow because I have no real investment in them. Before when I paid retail for them I was scared to use them on iron but read on the forum how they did well and since trying them diamonds burn thru anything! Nowdays you can buy cheap diamond blades if your plan is too abuse them. The diamonds are the same diamonds but a quality blade is the matrix that holds the diamonds to the blade (the glue ) So if I had a lot of production to do at home I would buy the cheap blades and burn thru them. But I would need to know how much production we are talking about.

Not sure what you are saying here Ben. The RPM of the tool will not change because a different blade is mounted.

The RIM SPEED of a particular blade will be affected by different motor speeds (motor RPM) Some blades are designed for optimal performance in a particular RPM range, and running above or below those speeds can cause them to overheat or other problems including break-up if run over their MAX RPM, but I am sure you are not talking about doing that.